CN-121985250-A - Linear motor transducer

CN121985250ACN 121985250 ACN121985250 ACN 121985250ACN-121985250-A

Abstract

The invention relates to a linear motor transducer which comprises a driving vibration unit, a control and energy supply unit and a pressure balance unit which are sequentially arranged along the axial direction, wherein the driving vibration unit comprises a header shell, a linear motor arranged in the header shell, and a front cover plate, wherein the front cover plate is connected with a rotor of the linear motor so that the front cover plate can move along with the rotor, and the front cover plate is formed by bonding a compression ring, a rubber ring and a radiation cover plate through a vulcanization process. The invention uses the linear motor as the driving source, can precisely control the vibration frequency and displacement of the radiation surface, and can grasp the current actual frequency and vibration displacement in real time.

Inventors

WANG XIAOFEI
HU JIANQIANG
Luo Sandou
HONG YOUCAI
MA ZHEN
HUANG DONG
Meng Ken
FAN JINLIANG
HU JIAN
ZHANG FENGHAI
LIU XIANFENG

Assignees

中国船舶集团有限公司第七一五研究所

Dates

Publication Date: 20260505
Application Date: 20260202

Claims (10)

1. The linear motor transducer is characterized by comprising a driving vibration unit, a control and energy supply unit and a pressure balance unit which are sequentially arranged along the axial direction; The driving vibration unit includes: A header housing; a linear motor disposed within the header housing; The front cover plate is connected with the rotor of the linear motor, so that the front cover plate can move along with the rotor; the front cover plate is formed by bonding a compression ring, a rubber ring and a radiation cover plate through a vulcanization process, wherein the compression ring is in sealing connection with the header shell; The control and power supply unit includes: an intermediate housing; A controller and a power module disposed within the intermediate housing; the controller is electrically connected with the linear motor and used for controlling the mover to reciprocate, and the power supply module is used for supplying power to the controller and the linear motor; The pressure balancing unit includes: the tail shell is provided with a water outlet penetrating through the shell; a flexible compensation balloon; The flexible compensation air bag is arranged in the tail shell and is communicated with the inner cavity through an air path, and the compensation air bag is used for generating deformation when external water pressure acts through the water through hole so as to adjust the pressure of the inner cavity; The linear motor comprises a displacement sensor for detecting the displacement of the rotor, the displacement sensor is electrically connected with the controller, and the controller is used for controlling the vibration of the radiation cover plate in the front cover plate according to signals fed back by the displacement sensor.
2. The linear motor transducer of claim 1, wherein the driving vibration unit further comprises a linear motor mounting plate, the stator of the linear motor is fixed on the linear motor mounting plate, the linear motor mounting plate is fixed in the head housing, and a wiring channel is arranged on the linear motor mounting plate.
3. The linear motor transducer of claim 1, wherein the control and power supply unit further comprises a mounting bracket, the controller and the power module are mounted on the mounting bracket, and one end of the mounting bracket is fixedly connected to the inside of the head housing.
4. The linear motor transducer of claim 1, wherein the compensation air bag is provided with a vent hole, the front end of the tail shell is provided with an air outlet hole which corresponds to the vent hole and is communicated with the vent hole in a sealing mode, and the compensation air bag is communicated with the inner cavity through an air passage formed by butt joint of the vent hole and the air outlet hole.
5. The linear motor transducer of claim 4, wherein a channel is preset between the head shell and the middle shell, and the channel is communicated with the air outlet hole.
6. The linear motor transducer of claim 1, wherein the head housing is further provided with an electrical connector, an inflation nozzle, a net electrical connector and a radiation cover plate connecting rod, the front cover plate is connected to the mover through the radiation cover plate connecting rod so that the front cover plate can move along with the movement of the mover, the net electrical connector is mounted on a top mounting surface of the head housing and used for connecting net electrical cables, and the inflation nozzle is mounted on the top mounting surface of the head housing and used for inflating the inner cavity.
7. The linear motor transducer of claim 1, wherein the displacement sensor is a grating displacement sensor and the linear motor is a closed loop control motor.
8. The linear motor transducer of claim 2, wherein the linear motor mounting plate is of an L-shaped design, the bottom of the L-shaped long side is of an arc surface design and is conformal with the inner arc of the head shell, the linear motor mounting hole is reserved on the upper portion of the L-shaped long side, the L-shaped short side is of a ring design with a notch, the head shell mounting hole is formed in the ring surface, and the center and the notch of the ring with the notch are preset.
9. The linear motor transducer of claim 1, wherein the compression ring has mounting holes thereon for attachment to the header housing.
10. The linear motor transducer of claim 8 wherein a flange is mounted within the header housing and the linear motor mounting plate is mounted to the flange through the header housing mounting hole and is coaxial therewith.

Description

Linear motor transducer Technical Field The invention belongs to the technical field of underwater acoustic transducers, and particularly relates to a linear motor transducer. Background The conventional transducers generally adopt a driving mode that piezoelectric ceramics, magnetostrictive materials and other materials deform to drive a vibration radiation surface to vibrate, or an electromotive force transducer adopts electromagnetic induction to drive the vibration radiation surface to vibrate, so that the transducers cannot accurately control vibration frequency and vibration displacement and cannot master the current actual frequency and vibration displacement in real time. Meanwhile, the existing electromotive force transducer directly applies voltage and current to the coil, and cannot work at low frequency, such as 1-10 Hz. Therefore, a transducer that enables accurate motion control, has real-time state feedback, and adapts to an underwater pressure environment is needed. Disclosure of Invention The invention aims to solve the technical problem of providing a linear motor transducer, which uses a linear motor as a driving source, can accurately control the vibration frequency and displacement of a radiation surface, and can master the current actual frequency and vibration displacement in real time. The technical scheme of the invention is that the linear motor transducer can be divided into three parts, wherein the first part is a driving part, the second part is a driving circuit part, and the third part is a compensation air bag part. The three parts are divided into three functional units, namely a driving vibration unit, a control and energy supply unit and a pressure balance unit, which are sequentially arranged and connected along the axial direction of the three functional units. The driving vibration unit is a driving part and has the functions of generating and outputting mechanical vibration, the control and energy supply unit is a driving circuit part and has the functions of supplying energy and performing intelligent control, and the pressure balance unit is a compensation air bag part and has the function of realizing the balance of the internal pressure and the external pressure of the energy converter. The driving vibration unit forms an acoustic wave radiation end of the transducer. The core of the device comprises a header shell, a linear motor fixedly arranged in the shell and a front cover plate directly driven by the linear motor. The mover of the linear motor is connected with the radiation cover plate in the front cover plate through a connecting piece, so that the front cover plate can move along with the mover. The front cover plate adopts a special composite sealing structure, namely, a metal radiation cover plate, a rubber ring with a fold design and a compression ring are integrally formed through a vulcanization process. The compression ring is fixed with the front end face of the header shell in a sealing way, and the rubber ring is used as an elastic connecting piece and is connected between the radiation cover plate and the compression ring. The design enables the radiation cover plate to axially reciprocate relative to the compression ring under the drive of the linear motor, and dynamic sealing is always kept through the fold deformation of the rubber ring. The linear motor is integrated with a displacement sensor for detecting real-time displacement of the rotor. The control and power unit integrates the control core and the energy conversion components of the transducer. It mainly includes a middle shell, and a controller and a power module which are installed in the middle shell. The controller is electrically connected with the linear motor and the displacement sensor thereof. The power module is responsible for converting externally input power into direct current suitable for the operation of the controller and the linear motor. The controller receives the instruction from the water surface control terminal (such as an industrial personal computer), acquires the feedback signal of the displacement sensor in real time, generates an accurate driving signal through a closed-loop control algorithm to control the movement of the linear motor, thereby realizing the accurate control of the vibration frequency and the vibration amplitude of the front cover plate, and can transmit the real-time movement state data back to the industrial personal computer. The pressure balancing unit is used for realizing automatic balancing of the pressure of the inner cavity of the transducer and the external water pressure. It mainly comprises a tail shell and a flexible compensation air bag encapsulated therein. The header housing and the intermediate housing together define a sealed interior cavity. And the compensating air bag is provided with an air vent. The tail shell is provided with a water outlet hole penetrating through the shell wall, and the front end of the tail shell